{"id":5460,"date":"2025-08-14T00:00:00","date_gmt":"2025-08-14T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/poe-rj45-connectors-rated-current\/"},"modified":"2026-06-22T08:29:02","modified_gmt":"2026-06-22T08:29:02","slug":"poe-rj45-connectors-rated-current","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/pt\/knowledge-center\/poe-rj45-connectors-rated-current","title":{"rendered":"Compreendendo a Corrente Nominal para Conectores RJ45 Integrados"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/558ae5d8b7f64ebfb9be887136ff2890.webp\" alt=\"Rated Current for PoE RJ45 Connectors\" class=\"wp-image-5457\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/558ae5d8b7f64ebfb9be887136ff2890.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/558ae5d8b7f64ebfb9be887136ff2890-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/558ae5d8b7f64ebfb9be887136ff2890-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/558ae5d8b7f64ebfb9be887136ff2890-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/558ae5d8b7f64ebfb9be887136ff2890-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >Introdu\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dispositivos conectados cada vez mais dependem de <strong>PoE (Power over Ethernet)<\/strong> para simplificar a fia\u00e7\u00e3o e permitir implanta\u00e7\u00f5es mais inteligentes. Conectores RJ45 integrados com componentes magn\u00e9ticos \u2014 muitas vezes chamados de <strong><em>MagJacks<\/em><\/strong>\u2014 devem transportar de forma confi\u00e1vel tanto dados quanto energia. Compreender suas classifica\u00e7\u00f5es de corrente \u00e9 fundamental ao projetar hardware de rede para atender aos padr\u00f5es IEEE PoE. Neste artigo, esclarecemos as classifica\u00e7\u00f5es t\u00edpicas de corrente, destacamos os fatores que as influenciam e apresentamos <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>MagJack LINK-PP<\/strong><\/a> solu\u00e7\u00f5es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Classifica\u00e7\u00f5es de corrente: n\u00e3o \u00e9 uma solu\u00e7\u00e3o \u00fanica para todos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As classifica\u00e7\u00f5es de corrente dos conectores RJ45 integrados variam conforme:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Metalurgia e revestimento dos contatos<\/strong> (por exemplo, cobre puro com revestimento espesso de ouro melhora a condutividade).<\/p><\/li><li><p><strong>Geometria do conector<\/strong>, como tamanho dos pinos, espa\u00e7amento e gerenciamento t\u00e9rmico.<\/p><\/li><li><p><strong>Uso de sinal versus pot\u00eancia<\/strong>\u2014 o Ethernet padr\u00e3o utiliza corrente m\u00ednima (&lt; 100 mA), enquanto o PoE leva os contatos ao limite.<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>A LINK-PP especifica at\u00e9 <strong>750 mA por contato<\/strong> em seu PoE+ <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/pt\/products\/rj45-connector-with-integrated-magnetics-lpjg0926henl-poe-plus\/\">LPJG0926HENL<\/a> .<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >Como os padr\u00f5es PoE definem os requisitos de corrente<\/h2>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 97px;\"\/><col style=\"width: 112px;\"\/><col style=\"width: 103px;\"\/><col style=\"width: 98px;\"\/><col style=\"width: 98px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"97\"><p><strong>Tipo de PoE<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"112\"><p><strong>Pot\u00eancia m\u00e1xima fornecida<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"103\"><p><strong>Tens\u00e3o t\u00edpica<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p><strong>Corrente por par<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p><strong>N\u00famero de pares<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>Corrente total<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"97\"><p>IEEE 802.3af <strong>(PoE)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"112\"><p>12,95 W (ao PD)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"103\"><p>44\u201357 V<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>350 mA<br> <\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>2<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u2248 <strong>0,35 A<\/strong> (conservador padr\u00e3o) <\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"97\"><p>IEEE 802.3at <strong>(PoE+)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"112\"><p>25,5 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"103\"><p>50\u201357 V<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>600 mA<br> <\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>2<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u2248 0,6 A por par \u00d72 = <strong>1,2 A<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"97\"><p>IEEE 802.3bt <strong>Tipo 3<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"112\"><p>51 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"103\"><p>50\u201357 V<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>600 mA<br> <\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u2248 0,6 A \u00d74 = <strong>2,4 A<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"97\"><p>IEEE 802.3bt <strong>Tipo 4<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"112\"><p>71,3 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"103\"><p>52\u201357 V<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>960 mA <\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"98\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u2248 0,96 A \u00d74 = <strong>3,84 A<\/strong><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Embora a corrente te\u00f3rica seja derivada de pot\u00eancia \u00f7 tens\u00e3o, a IEEE define limites de prote\u00e7\u00e3o <strong><em>por par<\/em><\/strong>. Isso garante qualifica\u00e7\u00e3o consistente do conector e seguran\u00e7a t\u00e9rmica.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >Exemplo: Conector PoE+ LINK-PP LPJG0926HENL<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff37a1694d7047578478950769526d70.png\" alt=\"LINK-PP LPJG0926HENL PoE+ Connector\" class=\"wp-image-5458\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff37a1694d7047578478950769526d70.png 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff37a1694d7047578478950769526d70-300x178.png 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff37a1694d7047578478950769526d70-1024x608.png 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff37a1694d7047578478950769526d70-768x456.png 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff37a1694d7047578478950769526d70-18x12.png 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/439792.htm\"><strong>LPJG0926HENL<\/strong><\/a> O MagJack PoE+ suporta <strong>IEEE 802.3at<\/strong> com um <strong>classifica\u00e7\u00e3o de corrente de 720 mA por contato<\/strong>. Como o PoE+ usa dois pares, essa classifica\u00e7\u00e3o por contato oferece margem ampla para confiabilidade no uso real.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esse tipo de margem \u00e9 essencial para desempenho de longo prazo em projetos compactos, onde pode ocorrer ac\u00famulo de calor e m\u00faltiplos ciclos t\u00e9rmicos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Implica\u00e7\u00f5es de projeto e boas pr\u00e1ticas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2605 <\/strong><span><strong>Selecione conectores com margem:<\/strong> Escolha componentes com classifica\u00e7\u00e3o acima da corrente m\u00ednima exigida pelo padr\u00e3o. Os MagJacks da LINK-PP normalmente superam os requisitos b\u00e1sicos.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2605 <\/strong><span><strong>Verifique as condi\u00e7\u00f5es indicadas na folha de dados:<\/strong> Certifique-se de que a classifica\u00e7\u00e3o de corrente seja especificada a <strong>25 \u00b0C ambiente<\/strong> com eleva\u00e7\u00e3o de temperatura \u226420 \u00b0C.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2605 <\/strong><span><strong>Considere o uso de quatro pares:<\/strong> Para projetos PoE++, certifique-se de que os conectores sejam certificados para <strong>IEEE 802.3bt Tipo 3 ou 4<\/strong>, ou seja, <strong>\u2265600 mA ou \u2265960 mA por par<\/strong>.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2605 <\/strong><span><strong>Combine cabo, transformador e PCB:<\/strong> Cada segmento \u2014 do conector \u00e0s magn\u00e9ticas, trilhas e cabo \u2014 afeta o caminho total de pot\u00eancia e a temperatura.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Conclus\u00e3o<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">MagJacks RJ45 integrados<\/a> s\u00e3o projetados para atender \u00e0s demandas espec\u00edficas de corrente com base nos padr\u00f5es PoE.<\/p><\/li><li><p>Embora um conector gen\u00e9rico possa suportar 1\u20132 A por contato, uma implanta\u00e7\u00e3o confi\u00e1vel exige correspond\u00eancia com os requisitos de corrente do padr\u00e3o. <strong>por par<\/strong>.<\/p><\/li><li><p>Os MagJacks da LINK-PP \u2014 especialmente modelos como o LPJG0926HENL \u2014 oferecem classifica\u00e7\u00f5es robustas (750 mA\/contato) com suporte ao IEEE 802.3at.<\/p><\/li><li><p>Para projetos PoE de alta pot\u00eancia e preparados para o futuro, certifique-se de que os conectores suportem <strong>Tipo 3 ou 4 (\u2265600 mA\u2013960 mA por par)<\/strong>.<\/p><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Saiba como os conectores RJ45 integrados suportam dados e energia \u2014 abrangendo as normas IEEE PoE, corrente nominal por contato\/par e insights sobre produtos confi\u00e1veis da Link-PP.<\/p>","protected":false},"author":1,"featured_media":5459,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22],"class_list":["post-5460","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/comments?post=5460"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5460\/revisions"}],"predecessor-version":[{"id":11258,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5460\/revisions\/11258"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media\/5459"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media?parent=5460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/categories?post=5460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/tags?post=5460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}